How to repair this edge ?

 From:  Zooen
10566.1 
Good evening, (ici en France il est 19h00!)

On the edge of a surface, I have an uninterrupted edge, with a small edge that goes in another direction. So I can't join the different faces of my object to make it a solid. I hope the pictures will clarify my point. otherwise I can add the surface in question.

Note: the trapezium above the interrupted edge is a void. I can still create a face, but I can't get a solid.

- Zooen

EDITED: 18 Aug 2024 by ZOOEN